hitchcock



I LMBH.

Sept. 22, 1925.

H. K. HITCHCQQK PROCESS AND APPARATUS FOR MAKING SHEET GLASS 3Sheets-$het 2 Filed Dec. 9, 19m

H. K. HITCHCOCK PROCESS AND' ymnmus FOR mum 51 m emss F; Sheets-Shae}; 5

Filed Dec. 9, 4

I /NVENTOR realise Sept. 22, 11925. lhhid hddl HALBERT K. .srrorrcocir,or rrrrseonon', "ennn'srrvrinra, assrorrort or ens-Hans T HITCHCOCKnxensrmnn'r comrnnr, A OQRPQBATION or NEW JERSEY.

W a? as n w i 4 l H...

PROCEfiSAND APPARATUS FOR MAKING SHEET GLASS.

Application filed December 9 1924. Serial l lo. 754,754. I

To at! 2072-0722 it may comer: controlling the gravity flow from theout- Be it known that I. Hemmer K..Hrtro1rlet slot, although in normaloperation, this COCK, a citizen of the United States, and a tank will bemaintained in a horizontal po resident of Pittsburgh, in the county ofAL sition. One embodiment of the invention is legheny and State ofPennsylvania, have illustrated in the accompanying drawings made a neeand useful invention in Imwherein: to 'provements in a Process andApparatus for Figure 1 is a vertical section through the Making SheetGlass,'0f which the following improved construction on the line I-I ofis a specification. Fig. 2. Fig. 2 is a vertical section taken Theinvention relates to the continuous on the center line of the apparatusin a formation of sheet glass by withdrawing it plans at right-angles tothat of Fig. 1. Fig. vertically from a tank or receptacle. and 3 is apartial horizontal section taken on the constitutes an improvement overthe eonline III-III of Figs 4.- And Fig- 4 is a struction shown in myapplication, Se Vertical'scction sim ar to that of Fig. 2, but rial No.606,388, filed Dec. 12, 1922. with the secondary tank at a lower levelThe present invention, as in the applithan in Fig. 2 and with such tanktilted cation referred to, utilizes gravity to seslightly from thehorizontal in order to cure the necessary feeding and'strcrching stopthe flow of glass from the outlet slot.

action upon the glass sheet, and provides Referring to the drawings, 1is the front f tunino it l t l} d fgedino' it end of a melting:- tank'oreierahl of the re- {1 b L \D l y through a horizontal leer instead otcarrygenerator type supported upon the foun- W ing it through a verticalleer. The invendation 2 cl: commercial sections and pro tion has for itsprimary objects, the provividcd with an outlet slot or opening sion ofan improved construction wherein a 3 for continuously withdrawing theglass flat sheet is secured requiring no grinding or from the tank bygravity. The glass polishing and the provision of improved dischargesinto a closed outlet trough 4 39 means for adjusting or regulating theover the drain lip 5, the amount of disgravity feed upon the sheetwhereby the decharge being controlled by the gate 6 epsired thickness ofsheet and speed of draw eluted from the screw 7 having a suitable may bd, hand Wheel 8. l l hen it is desired to com- Briefly stated theinvention contemplates pletely shut oil" the flow of glass from this 35th l y nt; of avertically adjustable tank, the water cooled gate 9 isemployed, secondary tank fed from the main melting such gate beingoperated from an overhead tank. such secondary tank being the one crane(not shown) by means oi. thechains from which the" gravity formation ofthe 10; The outlet portion of the tank is prefsheet occurs. By adjustingthe vertical pocrably supported by the casting 11 mount W sition of thesecondary tank, the lei'igth of ed upon the base or framework 2. ribbonor sheet bet-ween the drawing slot The outlet spent 4 is closed in by acover of the tank and the level of the leer is eorportion 12 and anyadditional heat necesres 'iondingly changed, thus varying the saryissupplied by the burners 13-13 cardrawing effect as imposed by gravity.This ried hy the spout and supplied, with gas dj 'n m; may b employee tVfl.1 the through the flexible pipe l4. The spout speed of draw and thethickness of the glass consists of 2 metal shell 15 with a lining sheetor ribbon to suit conditions and re 16 of refractory material, such asclay and is quirements, the sheet in this case, as in that pivotallyconnected at its rear end to the illustrated in my application referredto, becasting 11 as indicated at 1T. The forward 109 ing received upon agravity runway after end of the'spout is pivotally supported upon theglass has set to'a point where it will not a casting L by means of thepair of links mar, and being conducted from this runway 19, such pivotalarrangement of the trough into the horizontal leer through which theserving to permit it to follow the vertical glass is conductedcontinuously for annealmovements of the secondary tank, which will. ingand cooling. The secondary tank is new be described. also preferably soarranged that it may be The secondary tank 20 into which the tilted,thus giving an additional means for spout discharges and from "which thedraw sons to receive movements of the trough,

"iulg sheet glass, it

' provided with 1? adj acent the point at which the stream of glass fromthe melting tank strikes the bot "tom of the trough, sothat the up anddown the position of the secondary tank, causes substantially nodisturbance at this point, and so that bottom edge of the spout 5 and.the bottom of the trough is not varied'so as to disturb the coolingeffect at this point.

let I claim is:

L In combination in apparatus for forming sheet glass, a melting tank, asecondary tank in position to receive a of molten glass from the meltingtank,

jmoun'te'd "for vertical movement, and provided with a discharge slotdirected downmeans belowthe slot for receiving the ribbon of glass slot,and a horizon-' tel leer in position to receive the ribbon from saidmeans and provided with means for fc'arrying it therethrough.

In combination in apparatus for formvtankin position to receive agravity flow of molten glass from the melting tank, mounted forvertibalmovement, and provided with a discharge a curved runwaypositioned below said slot the ribbon of glass discharged through saidslot and to turn it -.latcra-lly, and a horizontal leer in position toreceive the ribbon from the'runway and means for carrying ittherethrough.

. 3. in combination in apparatus for form- .ing sheet glass, a meltingtank, a secondary tank in position to receive a, gravity liow of iuoltenfrom the melting tank, havii'iga discharge slot through its bottom, liftlug means upon which thesecondary tank mounted so that it may beadjusted vor- "iraily, means below the slot for receivhig a turninglaterally the ribbon oi. glass dis ch rged through the slot, and ahoriimutal leer in position to receive the ribbon from sail carrying ittherothrough.

in combination in apparatus for fern ing sheet glass,-a melting tank, asecondary tank in position to receive a gravity flow of molten glassfrom the melting, tank, haw ing a discharge slot through its bottom,lifting means upon which the secondary tank is mounted so that it may beadjusted vertically, and also tilted, means below the slot for receivingand turning laterally l he ribbon of glass discharged through the slot,and a horizontal leer in position to rec ive tl libon from said meansand provided with inoans for carrying it therethrough,

ii. In combination in apparatus for form sheet glass, '2; inciting thaving a irity discharge outlet, a secondary tank due to adjusting,

the clearance space between the gravity flow below the first tank,

. outlet, and means for conducting the melting tank, a secondary" slotdirected downwardly,-

means and provided with means for,

below the first tank, means for moving such tank vertically, a spoutarranged to receive the molten glass from said outlet and conduct it tothe secondary tank, a discharge outlet from the secondary tank, a runwayextending downwardly and laterally in position to receive the glasssheet or ribbon from said outlet from the secondary tank, and ahorizontal leer in position to receive said sheet or ribbon-from therunway.

6, In combination in apparatus for forming shoot glass, a melting tank,having a gravity discharge outlet, at secondary tank mounted forvertical adjustment, a spout positioned so as to receive the glassfromsaid outlet and conduct it intothe secondary tank, said spout beingpivotallymounted to permit it to adjust itself to the movements of thesecondary tank incident to its adjustment, a gravity discharge slotlea-ding downwardly from. the secondary tank, a horizontal leer belowsaid glass withdrawn from said slot continuously into and through theleer.

7. A process of making sheet/glass con- 'tinuously which consists inwithdrawing the therefrom in a vertical sheet or ribbon, al-

lowing said sl'iect to stretch of its own weight, and while it isstillplastic turning such sheet laterally, and finally carryiug it.coi'itiniuiusly through a horizontal lccr, the said secondary tank beingadjusted vertically to "vary the weight of the vertical portion of thesheet.

9. A process of inalking shect glass conlinuously which consists'linwithdrawing the molten glass continuously from a melting tank to asecondary tank, withdrawing the glass in said secondary tankcontinuously therefrom in a vertical bhcet or ribbon, al lowing saidsheet to stretch of its own weight, and while it is still plasticturning such sheet laterally, continuously through a horizontal leer,the rate of draw incident to the weight of'the shoot below the secondarytank being adjusted by raising and lowering the second my tank. V Y i10. in combination in apparatus for forming sheet glass, a melting tank,a sec tank continuously and finally carrying it ondary tank in positionto receive a gravity,

lng such tank vertically, a spout having a closure over its top arrangedto receive the molten glass from said outlet and conduct it to saidsecondary tank, means for applying heat to the glass as it flows throughsaid trough, a discharge outlet from said secondary tank, a runwayextending down- 'wardly and laterally in position to receive the glasssheet or ribbon from said outlet from the secondary tank, andahorizontal leer in position to receive said sheet or ribbon from therunway.

12. In combination inv apparatus for "forming sheet glass, a meltingtank, having a gravity discharge outlet, 'a secondary tank below thefirst tank, mounted for vertical adjustment, a spout positioned so as tore ceive the glass from said outlet and conduct it into the secondarytank, said .spout being pivotally mounted to permit it to adjust itselfto the movements of the secondary tank incident to its adjustment, agravity discharge slot leading downwardly from the secondary tank, ahorizontal leer below said outlet, and means for conducting the glasswithdrawn from said slot continuously into and through the leer, thesaidspout having its discharge end extended to a point below the level ofthe glass in the secondary tankand arranged so that it is maintainedbelow such level when said tank is adjusted 13p and down.

13. In combination in apparatus for forming sheet glass, a melting tank,having a gravity discharge outlet, a secondarytank below the first tank,means for moving such tank vertically, a spout having a closure over itstop arranged to receive the molten glass from said outlet and conductitto said secondary tank, means for applying heat to the glass as it flowsthrough said trough, means for applying heat to the glass in thesecondary tank, a discharge outlet from said secondary tank, a runwayextending downwardly and laterally in position to receive the glasssheet orribbon from said outlet from the secondary tank, and ahorizontal leer in position to receive said sheet or ribbon from therunway.

14. In combination in apparatus for forming sheet glass, a melting tank,having a gravity discharge outlet, a secondary tank below the firsttank, mounted for vertical adjustment, a spout positioned so as toreceive the glass from said outlet and con duct it into the secondarytank, said spout being pivotally supported at its upper end to permit itto adjust itself to the movements of the secondary tank incident to itsadjustment, and at'a point such that the glass from the melting tank isalways re ceived at substantially the same point in the trough, agravity discharge slot leading downwardly from the secondary tank, ahorizontal leer below said outlet, and means for conducting the glassWithdrawn from said. slot continuously into and through the leer.

In testimony whereof, I have hereunto subscribed my name this 21st'day01 New, 1924.

m nnnni'r K, inronooon.

H. K. HITCHCOCK APPhR ATu'S FOR MAKING SHEET GLASS Filed 680. 26 1924 3speetssne et 1 M W E v W

